package cn.lixuan.reggie.controller;

import cn.lixuan.reggie.common.R;
import cn.lixuan.reggie.dto.DishDto;
import cn.lixuan.reggie.entity.Category;
import cn.lixuan.reggie.entity.Dish;
import cn.lixuan.reggie.entity.DishFlavor;
import cn.lixuan.reggie.service.CategoryService;
import cn.lixuan.reggie.service.DishFlavorService;
import cn.lixuan.reggie.service.DishService;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @author: 李煊
 * @time: 2022/6/20 0020 18:33:50
 * @description: 菜品管理
 */

@RestController
@RequestMapping("/dish")
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        dishService.saveWithFlavor(dishDto);

        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * @author 李煊
     * @date 2022-06-20 19:58
     * @Description: 菜品信息分页查询
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {

        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();

        queryWrapper.like(name != null, Dish::getName, name);

        queryWrapper.orderByDesc(Dish::getUpdateTime);
        dishService.page(pageInfo, queryWrapper);

        // 对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");
        List<Dish> records = pageInfo.getRecords();

        List<DishDto> list = records.stream().map(item -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();
            Category category = categoryService.getById(categoryId);

            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /**
     * @author 李煊
     * @date 2022-06-20 20:51
     * @Description: 根据id查询菜品信息和对应的口味信息
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * @author 李煊
     * @date 2022-06-20 20:56
     * @Description: 修改菜品
     */
    @PutMapping
    public R<String>  update(@RequestBody DishDto dishDto) {
        dishService.updateWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        Set keys = redisTemplate.keys("dish_*"); //获取所有以dish_xxx开头的key
        redisTemplate.delete(keys); //删除这些key

        return R.success("修改菜品成功");
    }

    /**
     * @author 李煊
     * @date 2022-06-21 07:35
     * @Description: 根据条件查询对应菜品的数据
     */
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtoList = null;

        //动态构造key
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();//dish_1397844391040167938_1

        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

        if(dishDtoList != null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }

        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null ,Dish::getCategoryId,dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList = list.stream().map(item -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();
            Category category = categoryService.getById(categoryId);

            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());

        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }


}
